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Re: John Deere 4230 Injection pump timing
Posted to HD/Fleet Forum on 4/12/2023 3 Replies

Hi Don,

With the pump mounted and the outer slotted holes in the mid way setting, get a mirror and look at the pump timing gear. It has adjustment room.

That pump gear has 3 bolt holes that are slotted if I recall correctly. Loosen the gear retainer bolts ... Login to read more.

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